H. Opel

819 total citations
39 papers, 635 citations indexed

About

H. Opel is a scholar working on Animal Science and Zoology, Reproductive Medicine and Molecular Biology. According to data from OpenAlex, H. Opel has authored 39 papers receiving a total of 635 indexed citations (citations by other indexed papers that have themselves been cited), including 30 papers in Animal Science and Zoology, 15 papers in Reproductive Medicine and 7 papers in Molecular Biology. Recurrent topics in H. Opel's work include Animal Nutrition and Physiology (30 papers), Hypothalamic control of reproductive hormones (15 papers) and Bird parasitology and diseases (5 papers). H. Opel is often cited by papers focused on Animal Nutrition and Physiology (30 papers), Hypothalamic control of reproductive hormones (15 papers) and Bird parasitology and diseases (5 papers). H. Opel collaborates with scholars based in United States, Belize and India. H. Opel's co-authors include J.A. Proudman, A. V. Nalbandov, Mary Ann Ottinger, Stephanie McGuire, Colin G. Scanes, R. M. Fraps, John D. Buntin, Timothy J. DeVoogd, Elizabeth Adkins–Regan and Cheryl F. Harding and has published in prestigious journals such as Endocrinology, Biology of Reproduction and Poultry Science.

In The Last Decade

H. Opel

38 papers receiving 597 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
H. Opel United States 14 347 258 126 113 85 39 635
R. J. Sterling United Kingdom 13 284 0.8× 311 1.2× 119 0.9× 165 1.5× 98 1.2× 15 647
Trevor J. Nicholls United Kingdom 18 165 0.5× 208 0.8× 248 2.0× 77 0.7× 95 1.1× 28 840
S.C. Fehrer United States 11 200 0.6× 168 0.7× 106 0.8× 94 0.8× 58 0.7× 20 412
Michiharu Kamiyoshi Japan 15 260 0.7× 315 1.2× 55 0.4× 83 0.7× 119 1.4× 72 636
Monique Jallageas France 16 215 0.6× 108 0.4× 225 1.8× 59 0.5× 70 0.8× 32 640
Anna Gobbetti Italy 15 179 0.5× 151 0.6× 131 1.0× 95 0.8× 81 1.0× 47 732
M. E. El Halawani United States 19 427 1.2× 415 1.6× 178 1.4× 208 1.8× 145 1.7× 28 890
M. de Reviers France 15 214 0.6× 264 1.0× 58 0.5× 55 0.5× 99 1.2× 44 662
H.V. Biellier United States 20 493 1.4× 185 0.7× 64 0.5× 48 0.4× 103 1.2× 41 887
J Rzasa Poland 18 379 1.1× 223 0.9× 80 0.6× 56 0.5× 87 1.0× 70 912

Countries citing papers authored by H. Opel

Since Specialization
Citations

This map shows the geographic impact of H. Opel's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by H. Opel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites H. Opel more than expected).

Fields of papers citing papers by H. Opel

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by H. Opel. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by H. Opel. The network helps show where H. Opel may publish in the future.

Co-authorship network of co-authors of H. Opel

This figure shows the co-authorship network connecting the top 25 collaborators of H. Opel. A scholar is included among the top collaborators of H. Opel based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with H. Opel. H. Opel is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Proudman, J.A. & H. Opel. (1990). Effect of Peptide Histidine Isoleucine on In Vitro and In Vivo Prolactin Secretion in the Turkey. Poultry Science. 69(7). 1209–1214. 5 indexed citations
2.
3.
Opel, H. & J.A. Proudman. (1989). Plasma Prolactin Levels in Incubating Turkey Hens during Pipping of the Eggs and after Introduction of Poults into the Nest. Biology of Reproduction. 40(5). 981–987. 19 indexed citations
4.
Proudman, J.A. & H. Opel. (1989). Daily Changes in Plasma Prolactin, Corticosterone, and Luteinizing Hormone in the Unrestrained, Ovariectomized Turkey Hen. Poultry Science. 68(1). 177–184. 19 indexed citations
5.
Opel, H. & J.A. Proudman. (1988). Stimulation of Prolactin Release in Turkeys by Vasoactive Intestinal Peptide. Experimental Biology and Medicine. 187(4). 455–460. 44 indexed citations
6.
Proudman, J.A. & H. Opel. (1988). Stimulation of Prolactin Secretion from Turkey Anterior Pituitary Cells in Culture. Experimental Biology and Medicine. 187(4). 448–454. 24 indexed citations
7.
Opel, H. & J.A. Proudman. (1988). Effects of poults on plasma concentrations of prolactin in Turkey hens incubating without eggs or a nest. British Poultry Science. 29(4). 791–800. 16 indexed citations
8.
Opel, H.. (1984). Evidence against a role of prolactin in the timing of ovulation in the turkey. Biology of Reproduction. 30(3). 658–664. 4 indexed citations
9.
10.
Wentworth, B. C., et al.. (1983). Endocrine Changes in the Incubating and Brooding Turkey Hen11. Biology of Reproduction. 29(1). 87–92. 1 indexed citations
11.
Proudman, J.A. & H. Opel. (1980). Plasma prolactin levels in broody turkeys.. Poultry Science. 59(7). 7 indexed citations
12.
Opel, H. & J.A. Proudman. (1980). Failure of Mammalian Prolactin to Induce Incubation Behavior in Chickens and Turkeys. Poultry Science. 59(11). 2550–2558. 54 indexed citations
13.
Opel, H.. (1979). On Hypothalamic Control of Ovulation in the Turkey. Poultry Science. 58(3). 717–724. 8 indexed citations
14.
Opel, H.. (1979). Effects of Hypothalamic Deafferentation on Light-Stimulated Ovarian Function in Turkeys. Poultry Science. 58(5). 1382–1391. 4 indexed citations
15.
Opel, H.. (1969). Transbuccal Hypophysectomy in the Japanese Quail. Poultry Science. 48(2). 722–728. 4 indexed citations
16.
Opel, H.. (1967). Effects of Brain Piqure on the First and Second Ovipositions of the Hen's 2-Egg Sequence. Experimental Biology and Medicine. 125(2). 627–630. 2 indexed citations
17.
Opel, H.. (1966). A Simple Cannula for Implantation into the Chicken Brain. Poultry Science. 45(4). 856–858. 1 indexed citations
18.
Opel, H.. (1965). Oviposition in Chickens After Removal of the Posterior Lobe of the Pituitary by an Improved Method. Endocrinology. 76(4). 673–677. 10 indexed citations
19.
Opel, H.. (1964). Premature Oviposition Following Operative Interference with the Brain of the Chicken. Endocrinology. 74(2). 193–200. 4 indexed citations
20.
Opel, H. & A. V. Nalbandov. (1961). Onset of Follicular Atresia Following Hypophysectomy of the Laying Hen.. Experimental Biology and Medicine. 107(2). 233–235. 4 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by R. J. Sterling Breakdown of academic impact, for papers by Trevor J. Nicholls Breakdown of academic impact, for papers by S.C. Fehrer Breakdown of academic impact, for papers by Michiharu Kamiyoshi Breakdown of academic impact, for papers by Monique Jallageas Breakdown of academic impact, for papers by Anna Gobbetti Breakdown of academic impact, for papers by M. E. El Halawani Breakdown of academic impact, for papers by M. de Reviers Breakdown of academic impact, for papers by H.V. Biellier Breakdown of academic impact, for papers by J Rzasa
Rankless by CCL
2026